Active stylus chip, touch chip, active stylus, touch screen and electronic device

Abstract

The embodiment of the application provides a stylus chip, a touch chip, a stylus, a touch screen and an electronic device. The stylus chip comprises: a first pin and at least two second pins; the first pin is electrically connected with a stylus tip electrode; the at least two second pins are electrically connected with at least two detection sub-electrodes; different second pins are electrically connected with different detection sub-electrodes; the first pin can output a first coding signal to the stylus tip electrode after the stylus tip electrode contacts the touch screen, so that the touch screen determines the contact position of the stylus tip electrode and the touch screen according to the first coding signal; the second pin can output a second coding signal to the connected detection sub-electrode, so that the touch screen identifies the rotation state of the stylus according to the second coding signal output by the at least two detection sub-electrodes, wherein the rotation state comprises at least one of a rotation angle and a rotation direction. The stylus chip can realize the rotation detection function of the stylus without a gyroscope, so that the cost of the stylus is low.

Description

Technical Field

[0001] This application relates to the field of stylus technology, and more particularly to an active pen chip, a touch chip, an active pen, a touch screen, and an electronic device. Background Technology

[0002] Peripheral input components for electronic devices include passive capacitive pens and active capacitive pens. Passive capacitive pens use conductive materials at the tip to simulate a finger inputting touch commands on the touchscreen of the electronic device. Active capacitive pens output electrical signals to the touchscreen through electrodes at the tip. The touchscreen recognizes the touch commands based on the electrical signals output by the active capacitive pens. Because passive capacitive pens need to simulate a finger for touch, the pen tip is relatively thick and the accuracy is low. On the other hand, active capacitive pens do not need to simulate a finger for touch, so the pen tip is relatively thin and the accuracy is high. In scenarios where high accuracy is required, active capacitive pens have become the main peripheral input components for electronic devices.

[0003] Currently, active capacitive pens use a gyroscope to detect the rotation of the pen body, allowing users to interact with electronic devices by rotating the pen body.

[0004] However, the high cost of gyroscopes leads to a higher cost for active capacitive pens equipped with gyroscopes. Utility Model Content

[0005] In view of this, embodiments of this application provide an active pen chip, a touch chip, an active pen, a touch screen, and an electronic device to at least partially solve the above-mentioned problems.

[0006] According to a first aspect of the embodiments of this application, an active pen chip is provided for use in an active pen. The active pen includes a pen housing, a pen tip electrode, and a detection electrode. The pen tip electrode is partially located outside and partially located inside the pen housing. The detection electrode is disposed inside the pen housing and includes at least two detection sub-electrodes. The at least two detection sub-electrodes are arranged around the pen tip electrode and are insulated from each other and from the pen tip electrode. The active pen chip includes a first pin and at least two second pins. The first pin is electrically connected to the pen tip electrode, and the at least two second pins are electrically connected to the pen tip electrode. The pen tip is electrically connected to at least two detection sub-electrodes, and different second pins are electrically connected to different detection sub-electrodes. The first pin is used to output a first coding signal to the pen tip electrode after the pen tip electrode contacts the touch screen, so that the touch screen determines the contact position between the pen tip electrode and the touch screen according to the first coding signal. The second pin is used to output a second coding signal to the connected detection sub-electrodes, so that the touch screen identifies the rotation state of the active pen according to the second coding signal output by the at least two detection sub-electrodes, wherein the rotation state includes at least one of rotation angle and rotation direction.

[0007] In one possible implementation, each of the second pins simultaneously outputs a second coding signal of a different frequency to the connected detection sub-electrode, so that each of the detection sub-electrodes simultaneously outputs a second coding signal of a different frequency.

[0008] In one possible implementation, each of the second pins outputs the second coding signal of the same frequency to the connected detection sub-electrode in sequence according to the detection timing, and only one of the second pins outputs the second coding signal at any given time, so that each of the detection sub-electrodes outputs the second coding signal of the same frequency in sequence according to the detection timing.

[0009] In one possible implementation, the first pin is used to receive a matching signal transmitted by the pen tip electrode from the touch screen, and output the first coding signal to the pen tip electrode according to the touch protocol indicated by the matching signal; the second pin is used to output the second coding signal to the connected detection sub-electrode according to the touch protocol indicated by the matching signal.

[0010] According to a second aspect of the embodiments of this application, a touch chip is provided for use in a touch screen. The touch chip includes: a plurality of third pins; the plurality of third pins are electrically connected to a plurality of electrodes on the touch screen; each third pin is configured to receive a first sensing signal generated by the connected electrodes, the first sensing signal being generated based on a first coding signal acting on the mutual capacitance between the electrodes and the tip electrode of an active pen, the first coding signal being output by the tip electrode; and to receive a second sensing signal generated by the connected electrodes, the second sensing signal being generated based on a second coding signal acting on the mutual capacitance between the electrodes and the detection sub-electrode of the active pen, the second coding signal being... Output from the detection sub-electrode, the first sensing signal is used to determine the contact position between the pen tip electrode and the touch screen, and the second sensing signal is used to identify the rotation state of the active pen, wherein the rotation state includes at least one of rotation angle and rotation direction. The active pen includes the pen tip electrode, the pen shell, and the detection electrode. The pen tip electrode is partially located outside the pen shell and partially located inside the pen shell. The detection electrode is disposed inside the pen shell and includes at least two detection sub-electrodes. The at least two detection sub-electrodes are disposed around the pen tip electrode and are insulated from each other and from the pen tip electrode.

[0011] In one possible implementation, the touch chip further includes: a detection unit; the third pin is configured to receive multiple second sensing signals of different frequencies generated by the connected electrodes, the different frequency sensing signals being generated based on the second coding signals of different frequencies, and each detection sub-electrode simultaneously outputting the second coding signals of different frequencies; the detection unit is configured to identify the rotation state of the active pen based on the multiple second sensing signals of different frequencies; or, the third pin is configured to receive multiple second sensing signals of the same frequency generated by the connected electrodes, the same frequency sensing signals being generated based on the second coding signals of the same frequency, wherein each detection sub-electrode outputs the second coding signals of the same frequency sequentially according to a detection timing sequence; the detection unit is configured to identify the rotation state of the active pen based on the detection timing sequence and the second sensing signals.

[0012] In one possible implementation, the detection unit is configured to determine the projection coordinates of the detection sub-electrode corresponding to the second sensing signal on the touch screen based on the second sensing signal, and to determine the rotation state of the active pen based on the change of the projection coordinates.

[0013] In one possible implementation, the detection unit is configured to identify the tilt angle of the active pen based on the second sensing signal.

[0014] In one possible implementation, the third pin is used to output a matching signal to the connected electrode, causing the active pen to output the first coding signal through the pen tip electrode and the second coding signal through the detection electrode according to the touch protocol indicated by the matching signal.

[0015] According to a third aspect of the embodiments of this application, an active pen is provided, comprising: a pen shell, a pen tip electrode, a detection electrode, and an active pen chip as described in the first aspect; the pen tip electrode is partially located outside and partially located inside the pen shell, the detection electrode is disposed inside the pen shell, the detection electrode includes at least two detection sub-electrodes, the at least two detection sub-electrodes are disposed around the pen tip electrode, the at least two detection sub-electrodes are insulated from each other, and the detection sub-electrodes are insulated from the pen tip electrode; the pen tip electrode is configured to contact a touch screen of an electronic device, and after contacting the touch screen, transmits a first coding signal output by the active pen chip, so that the touch screen determines the contact position between the pen tip electrode and the touch screen according to the first coding signal; the detection sub-electrodes are used to transmit a second coding signal output by the active pen chip, so that the touch screen identifies the rotation state of the active pen according to the second coding signal output by the at least two detection sub-electrodes, wherein the rotation state includes at least one of a rotation angle and a rotation direction.

[0016] In one possible implementation, the detection electrode includes two or three detection sub-electrodes.

[0017] According to a fourth aspect of the present application, a touch screen is provided, comprising: a plurality of electrodes and a touch chip as described in the second aspect; the touch chip is electrically connected to the plurality of electrodes via a plurality of third pins.

[0018] According to a fifth aspect of the embodiments of this application, an electronic device is provided, including: a touch chip as described in the second aspect, or a touch screen as described in the fourth aspect.

[0019] According to the active pen chip provided in the embodiments of this application, the active pen chip includes a first pin and at least two second pins. The active pen includes a pen shell, a pen tip electrode, and a detection electrode. The detection electrode includes at least two detection sub-electrodes. The first pin in the active pen chip can output a first coding signal to the pen tip electrode. The touch screen can determine the pen tip click position based on the first coding signal to realize the touch function of the active pen. The second pin in the active pen chip can output a second coding signal to the connected detection sub-electrodes. The touch screen can determine the rotation state of the active pen based on the second coding signal, so that the touch screen can realize different interactions based on the rotation state of the active pen. The functional expandability is strong. Compared with the prior art, since the active pen chip outputs the second coding signal to each detection sub-electrode to enable the touch screen to detect the rotation state of the active pen, there is no need to set an additional gyroscope in the active pen, and the cost of the active pen is low. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of an active pen provided in an embodiment of this application; Figure 2 This is a cross-sectional view of an active pen provided in an embodiment of this application; Figure 3 This is a cross-sectional view of another active pen provided in an embodiment of this application; Figure 4 This is a cross-sectional view of another active pen provided in the embodiments of this application; Figure 5 This is a schematic diagram of an active pen chip provided in an embodiment of this application; Figure 6 This is a schematic diagram of a touch chip provided in an embodiment of this application; Figure 7 This is a schematic diagram of another touch chip provided in an embodiment of this application; Figure 8 This is a schematic diagram of another touch chip provided in the embodiments of this application. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions in the embodiments of this application, the technical solutions in the embodiments of this application will be clearly and thoroughly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art should fall within the protection scope of the embodiments of this application.

[0023] As mentioned earlier, peripheral input components for electronic devices include passive capacitive pens and active capacitive pens. Passive capacitive pens use conductive material at the tip to simulate a finger inputting touch commands on the electronic device's touchscreen. Active capacitive pens output electrical signals to the touchscreen through electrodes at the tip, and the touchscreen recognizes the touch commands based on these signals. Because passive capacitive pens need to simulate finger touch, their tips are relatively thick, resulting in lower accuracy. In contrast, active capacitive pens do not need to simulate finger touch, so their tips are thinner, resulting in higher accuracy. In scenarios requiring high accuracy, active capacitive pens have become the primary peripheral input component for electronic devices. Currently, active capacitive pens use gyroscopes to detect pen body rotation, allowing users to interact with the electronic device by rotating the pen. However, gyroscopes are expensive, leading to higher costs for active capacitive pens with gyroscopes.

[0024] This application provides an active pen chip, which includes a first pin and at least two second pins. The active pen includes a pen shell, a pen tip electrode, and a detection electrode. The detection electrode includes at least two detection sub-electrodes. The first pin of the active pen chip can output a first coding signal to the pen tip electrode. The touch screen can determine the pen tip click position based on the first coding signal to realize the touch function of the active pen. The second pin of the active pen chip can output a second coding signal to the connected detection sub-electrodes. The touch screen can determine the rotation state of the active pen based on the second coding signal, so that the touch screen can realize different interactions based on the rotation state of the active pen. The functional expandability is strong. Compared with the prior art, since the active pen chip outputs the second coding signal to each detection sub-electrode to enable the touch screen to detect the rotation state of the active pen, there is no need to set an additional gyroscope in the active pen, and the cost of the active pen is low.

[0025] The active pen, touch chip, touch screen, and electronic device provided in this application are illustrated below through examples.

[0026] Figure 1 This is a schematic diagram of an active pen provided in an embodiment of this application, such as... Figure 1 As shown, the active pen 100 includes a pen shell 101, a pen tip electrode 102, and a detection electrode 103.

[0027] The pen tip electrode 102 is partially located inside the pen housing 101 and partially located outside the pen housing 101. The pen tip electrode 102 located outside the pen housing 101 serves as the pen tip of the active pen 100 and can contact the touch screen of the electronic device. Optionally, the pen tip electrode 102 located inside the pen housing 101 can be clamped by a clamping member located inside the pen housing 101 to fix the relative position between the pen tip electrode 102 and the pen housing 101. Optionally, the pen tip electrode 102 can be composed of a first pen tip assembly and a second pen tip assembly. The second pen tip assembly is partially located inside the pen housing 101, and the first pen tip assembly covers the end of the second pen tip assembly located outside the pen housing 101. Optionally, the first pen tip assembly is made of a non-conductive plastic material, such as polycarbonate (PC plastic) and ABS plastic, or nylon and glass fiber, etc., and the second pen tip assembly is made of a metal material, such as stainless steel.

[0028] The detection electrode 103 is located inside the pen housing 101. The detection electrode 103 includes at least two detection sub-electrodes 1031, which are arranged around the outside of the pen tip electrode 102. That is, the detection electrode 103 is located between the pen tip electrode 102 and the pen housing 101, and the detection sub-electrodes 1031 are insulated from the pen tip electrode 102. Optionally, the detection sub-electrodes 1031 and the pen tip electrode 102 can be insulated with an insulating layer, that is, an insulating layer can be provided between the detection electrode 103 and the pen tip electrode 102. Alternatively, the detection electrode 103 and the pen tip electrode 102 can be insulated with air, that is, the inner surface of the detection electrode 103 does not contact the outer surface of the pen tip electrode 102 and there is a certain gap. The specific insulation method can be set as needed.

[0029] Figure 2 This is a cross-sectional view of an active pen provided in an embodiment of this application. For example... Figure 2 As shown, at least two detection sub-electrodes 1031 are spliced ​​together to form a detection electrode 103, and an insulating layer 1032 is provided between adjacent detection sub-electrodes 1031.

[0030] Figure 2 The diagram shows a cross-sectional view with a plane perpendicular to the axis of the pen tip electrode 102. At least two detection sub-electrodes 1031 can be joined together to form a detection electrode 103. An insulating layer 1032 can be provided between adjacent detection sub-electrodes 1031 to ensure that different detection sub-electrodes 1031 are insulated from each other. The insulating layer 1032 may include insulating adhesive, insulating ink layer, etc.

[0031] Optionally, gaps may exist between adjacent detection sub-electrodes 1031, insulated by an air layer; that is, the insulating layer 1032 is an air layer. Figure 3 This is a cross-sectional view of another active pen provided in an embodiment of this application, such as... Figure 3As shown, adjacent detection sub-electrodes 1031 do not contact each other and are insulated by an air layer.

[0032] It should be understood that Figure 2 and Figure 3 The image shows multiple detection sub-electrodes 1031 spliced ​​together to form a hollow frustum-shaped detection electrode 103. In some other examples, Figure 4 This is a cross-sectional view of another active pen provided in the embodiments of this application, such as... Figure 4 As shown, multiple detection sub-electrodes 1031 can also be spliced ​​together to form a hollow cylindrical detection electrode 103, and the specific form of the detection electrode 103 can be set as needed.

[0033] Active pen 100 based on the above structure Figure 5 This is a schematic diagram of an active pen chip provided in an embodiment of this application, as shown below. Figure 5 As shown, the active pen chip 200 includes a first pin 201 and at least two second pins 202. The first pin 201 is electrically connected to the pen tip electrode 102, and the at least two second pins 202 are electrically connected to at least two detection sub-electrodes 1031, with different second pins 202 being electrically connected to different detection sub-electrodes 1031.

[0034] After the pen tip electrode 102 contacts the touch screen, the first pin 201 can output a first coding signal to the pen tip electrode 102. The first coding signal can be transmitted to the electrodes distributed on the touch screen through the coupling capacitance (mutual capacitance) between the pen tip electrode 102 and the electrodes distributed on the touch screen, so that the touch screen can determine the touch position of the pen tip electrode 102, that is, the click position of the pen tip of the active pen 100 on the touch screen, based on the first coding signal. In a specific implementation, the touch screen can determine the contact position between the pen tip electrode 102 and the touch screen based on the first sensing signal. The first sensing signal is generated by the first coding signal acting on the mutual capacitance between the pen tip electrode 102 and the touch screen.

[0035] The second pin 202 can output a second coding signal to the connected detection sub-electrode 1031. For example, when the detection electrode 103 includes two detection sub-electrodes 1031, the two second pins 202 output two second coding signals to the two detection sub-electrodes 1031 respectively; when the detection electrode 103 includes three detection sub-electrodes 1031, the three second pins 202 output three second coding signals to the three detection sub-electrodes 1031 respectively. The second coding signal can be transmitted to the electrodes distributed on the touch screen through the coupling capacitance (mutual capacitance) between the detection sub-electrode 1031 and the electrodes distributed on the touch screen, so that the touch screen can identify the rotation state of the active pen 100 according to the second coding signal. In a specific implementation, the touch screen can determine the rotation state of the active pen 100 based on the second sensing signal, which is generated by the second coding signal acting on the mutual capacitance between the detection sub-electrode 1031 and the touch screen. The rotation state of the active pen 100 includes at least one of the rotation angle and the rotation direction of the active pen 100.

[0036] It should be understood that when the active pen 100 rotates, the distance between each detection sub-electrode 1031 in the active pen 100 and the touch screen will change. For example, when the detection electrode 103 includes two detection sub-electrodes 1031, if the active pen 100 rotates, the distance between one detection sub-electrode 1031 and the touch screen will increase from small to large, and the distance between the other detection sub-electrode 1031 and the touch screen will decrease from large to small. The touch screen can determine the rotation state of the active pen 100 based on the signal strength of the second sensing signal corresponding to each detection sub-electrode 1031 generated by mutual capacitance.

[0037] In addition to outputting the second coding signal, the detection sub-electrode 1031 can also shield the pen tip electrode 102. Specifically, each detection sub-electrode 1031 is arranged around the pen tip electrode 102 and the pen shell 101. The pen tip electrode 102 is partially located within the detection electrode 103 formed by the detection sub-electrodes 1031. The detection electrode 103 can shield the electric field generated by the part of the pen tip electrode 102 located within the detection electrode 103, so that the electric field generated by the first coding signal on the pen tip electrode 102 is concentrated on the pen tip electrode 102 located outside the detection electrode 103. That is, the electric field generated by the first coding signal is concentrated on the pen tip electrode 102 located outside the pen shell 101, which can make the active pen 100 more sensitive.

[0038] In this embodiment, the active pen chip 200 includes a first pin 201 and at least two second pins 202. The active pen 100 includes a pen shell 101, a pen tip electrode 102, and a detection electrode 103. The detection electrode 103 includes at least two detection sub-electrodes 1031. The first pin 201 of the active pen chip 200 can output a first coding signal to the pen tip electrode 102. The touch screen can determine the pen tip click position of the active pen 100 according to the first coding signal, thereby realizing the touch function of the active pen 100. Pin 202 can output a second coding signal to the connected detection sub-electrode 1031. The touch screen can determine the rotation state of the active pen 100 based on the second coding signal, enabling the touch screen to perform different interactions based on the rotation state of the active pen 100. It has strong functional expandability. Compared with the prior art, since the active pen chip 200 outputs the second coding signal to each detection sub-electrode 1031 to enable the touch screen to detect the rotation state of the active pen 100, there is no need to set up an additional gyroscope in the active pen 100, and the cost of the active pen 100 is lower.

[0039] In one possible implementation, each second pin 202 simultaneously outputs a second coding signal of different frequencies to the connected detection sub-electrode 1031, so that all detection sub-electrodes 1031 simultaneously output second coding signals of different frequencies.

[0040] All second pins 202 can simultaneously output second coding signals of different frequencies to the connected detection sub-electrodes 1031. For example, when the detection electrode 103 includes two detection sub-electrodes 1031, the two second pins 202 output two second coding signals of different frequencies to the connected detection sub-electrodes 1031, so that the two detection sub-electrodes 1031 each output two second coding signals of different frequencies. When the detection electrode 103 includes three detection sub-electrodes 1031, the three second pins 202 output three second coding signals of different frequencies to the connected detection sub-electrodes 1031, so that the three detection sub-electrodes 1031 each output three second coding signals of different frequencies. The second coding signals can be transmitted to the electrodes distributed on the touch screen through the coupling capacitance (mutual capacitance) between the detection sub-electrodes 1031 and the electrodes distributed on the touch screen. The touch screen can identify the rotation state of the active pen 100 based on each second coding signal. In one implementation, the location of the detection electrode 103 corresponding to the second coding signal can be determined based on the frequency of the second coding signal, or the distance between the detection electrode 103 and the touch screen can be determined based on the frequency and the second coding signal. In another implementation, the touch screen can determine the rotation state of the active pen 100 based on multiple second sensing signals of different frequencies. The different frequencies of the second sensing signals are generated by the mutual capacitance between the detection sub-electrode 1031 and the touch screen caused by the second coding signals of different frequencies.

[0041] Optionally, the first coding signal may have a different frequency than each of the second coding signals. While the second pin 202 outputs the second coding signal to the connected detection sub-electrode 1031, the first pin 201 outputs the first coding signal to the connected pen tip electrode 102. This enables simultaneous touch position detection and rotation state detection.

[0042] In this embodiment, each second pin 202 simultaneously outputs a second coding signal of different frequencies to the connected detection sub-electrode 1031, so that each detection sub-electrode 1031 of the active pen 100 simultaneously outputs a second coding signal of different frequencies. The touch screen can determine the rotation state of the active pen 100 based on the second coding signal. Since the second coding signals of different frequencies are output simultaneously, the touch screen can determine the rotation state of the active pen 100 at the same time based on multiple second coding signals of different frequencies, which can improve the recognition efficiency of the rotation state of the active pen 100.

[0043] In one possible implementation, each second pin 202 outputs a second coding signal of the same frequency to the connected detection sub-electrode 1031 in sequence according to the detection timing, and only one second pin 202 outputs the second coding signal at any given time, so that at least two detection sub-electrodes 1031 output the second coding signal of the same frequency in sequence according to the detection timing, and only one detection sub-electrode 1031 outputs the second coding signal at any given time.

[0044] In addition to simultaneously outputting second coding signals of different frequencies to the connected detection sub-electrode 1031, each second pin 202 can also output second coding signals of the same frequency in a time-division manner. Specifically, at least two second pins 202 can output second coding signals to at least two detection sub-electrodes 1031 in sequence according to the detection timing. For example, if there are a total of three detection sub-electrodes 1031, in the first time period, the first second pin 202 outputs the second coding signal to the connected detection sub-electrode 1031; in the second time period, the second second pin 202 outputs the second coding signal to the connected detection sub-electrode 1031; and in the third time period, the third second pin 202 outputs the second coding signal to the connected detection sub-electrode 1031. The first time period, the second time period, and the third time period do not overlap.

[0045] Optionally, the first coding signal may have a different frequency than the second coding signal. While each second pin 202 sequentially outputs the second coding signal to the connected detection sub-electrode 1031 according to a time-based detection sequence, the first pin 201 outputs the first coding signal to the connected pen tip electrode 102, thus simultaneously performing touch position detection and rotation state detection. Alternatively, the first coding signal may have the same frequency as the second coding signal. The first pin 201 and each second pin 202 sequentially output the first and second coding signals according to a time-based detection sequence, performing touch position detection and rotation state detection in a time-division multiplexing manner.

[0046] In this embodiment, each second pin 202 outputs a second coding signal of the same frequency to the connected detection sub-electrode 1031 in sequence according to the detection timing. At any given time, only one second pin 202 outputs the second coding signal. The touch screen can determine the rotation state of the active pen 100 based on the detection timing and the second coding signal. Since each second pin 202 outputs the second coding signal of the same frequency in sequence according to the detection timing, compared with the simultaneous output of second coding signals of different frequencies in the previous embodiment, the time required to identify the rotation state of the active pen 100 is longer. However, it is not necessary to set up a signal generator of different frequencies in the active pen chip. The original structure of the active pen chip can be used to control each detection sub-electrode 1031 to output the second coding signal of the same frequency in sequence, which is low cost.

[0047] In one possible implementation, the first pin 201 can receive a matching signal sent by the touch screen through the pen tip electrode 102. The matching signal can indicate the touch protocol. The touch protocol can at least indicate the coding method of the active pen chip 200. For example, each second pin 202 can simultaneously output second coding signals of different frequencies, or each second pin 202 can sequentially output second coding signals of the same frequency according to the detection timing, etc. The touch protocol can also indicate the signal amplitude, signal frequency, signal waveform, etc. of the coding signal output by the active pen chip.

[0048] After receiving the matching signal, the active pen chip 200 outputs a first coding signal to the pen tip electrode 102 through the first pin 201 and a second coding signal to the connected detection sub-electrode 1031 through the second pin 202, according to the touch protocol indicated by the matching signal.

[0049] Optionally, in addition to receiving the matching signal through the pen tip electrode 102, the active pen chip 200 can also wirelessly communicate with the electronic device where the touch screen is located through a wireless module to receive the matching signal via wireless communication. The specific method of receiving the matching signal can be set as needed.

[0050] In this embodiment, the first pin 201 can receive a matching signal sent by the touch screen through the pen tip electrode 102, and control the pen tip electrode 102 to output a first coding signal according to the touch protocol in the matching signal. The second pin 202 can output a second coding signal to the connected detection sub-electrode 1031 according to the touch protocol indicated by the matching signal. Thus, the touch protocol can be matched with the touch screen through the matching signal, so that the touch screen can identify the click position of the active pen 100 according to the first coding signal, and identify the rotation state of the active pen 100 according to the second coding signal output by each detection sub-electrode 1031.

[0051] Figure 6 This is a schematic diagram of a touch chip provided in an embodiment of this application. The touch chip 300 can be applied to the touch screen in any of the foregoing embodiments. Figure 6 As shown, the touch chip 300 includes multiple third pins 301.

[0052] Multiple third pins 301 are electrically connected to multiple electrodes 400 distributed on the touch screen. Different third pins 301 are connected to different electrodes 400. Optionally, the touch screen may include horizontally distributed horizontal electrodes and vertically distributed vertical electrodes. The horizontal electrodes can detect the vertical coordinate of the click position of the pen tip of the active pen 100, and the vertical electrodes can detect the horizontal coordinate of the click position of the pen tip of the active pen 100, thereby detecting the contact position between the pen tip electrode 102 of the active pen 100 and the touch screen.

[0053] The third pin 301 can receive the first sensing signal generated by the connected electrode 400. Specifically, when the pen tip electrode 102 of the active pen 100 clicks on the touch screen, there is mutual capacitance between the pen tip electrode 102 and the electrodes 400 distributed on the touch screen. At this time, since the pen tip electrode 102 outputs the first coding signal, the first coding signal acts on the mutual capacitance between the pen tip electrode 102 and the electrodes 400 on the touch screen, causing the electrodes 400 on the touch screen to generate the first sensing signal. The first sensing signal can be used to identify the contact position between the pen tip electrode 102 of the active pen 100 and the touch screen, that is, to identify the click position of the pen tip of the active pen 100 on the touch screen.

[0054] The third pin 301 can also receive the second sensing signal generated by the connecting electrode 400. Specifically, when the pen tip electrode 102 of the active pen 100 taps the touch screen, there is mutual capacitance between each detection sub-electrode 1031 on the active pen 100 and the electrodes 400 distributed on the touch screen. At this time, since each detection sub-electrode 1031 outputs a second coding signal, the second coding signal acts on the mutual capacitance between the detection sub-electrode 1031 and the electrodes 400 on the touch screen, causing the electrodes 400 on the touch screen to generate a second sensing signal corresponding to each detection sub-electrode 1031. The second sensing signal can be used to identify the rotation state of the active pen 100, and the rotation state includes at least one of rotation angle and rotation direction.

[0055] It should be understood that the active pen 100 in the embodiments of this application can be the active pen 100 in any of the foregoing embodiments, that is, the active pen 100 includes a pen tip electrode 102, a pen shell 101 and a detection electrode 103. The pen tip electrode 102 is partially located outside the pen shell 101 and partially located inside the pen shell 101. The detection electrode 103 is disposed inside the pen shell 101. The detection electrode 103 includes at least two detection sub-electrodes 1031. The at least two detection sub-electrodes 1031 are disposed around the pen tip electrode 102. The at least two detection sub-electrodes 1031 are insulated from each other, and the detection sub-electrodes 1031 are insulated from the pen tip electrode 102.

[0056] Optionally, Figure 7 This is a schematic diagram of another touch chip provided in an embodiment of this application, as shown below. Figure 7As shown, the touch chip 300 also includes multiple signal processing units 302, which are electrically connected to multiple third pins 301. Different signal processing units 302 are electrically connected to different third pins 301. Each signal processing unit 302 can convert the first sensing signal transmitted through the third pin 301 into a touch detection signal. Optionally, each signal processing unit 302 may include a trans-impedance amplifier (TIA), which can convert the first sensing signal into a voltage signal. Optionally, each signal processing unit 302 also includes a post-processing circuit, which includes at least one of a differential amplifier, a buffer amplifier, a filter, and a hold circuit, and includes an analog-to-digital converter (ADC). The post-processing circuit can convert the voltage signal output by the TIA into a touch detection signal (digital signal). The touch detection signal is used to identify the contact position between the pen tip electrode 102 of the active pen 100 and the touch screen, i.e., to identify the click position of the pen tip of the active pen 100 on the touch screen. And / or, the second sensing signal can be converted into a voltage signal through the TIA, and the voltage signal output by the TIA can be converted into a rotation detection signal (digital signal) through the subsequent processing circuit. The rotation detection signal is used to identify the rotation state of the active pen 100.

[0057] In this embodiment, the touch chip 300 includes multiple third pins 301 connected to multiple electrodes 400. The multiple third pins 301 can receive first sensing signals generated by the connected electrodes 400, thereby determining the click position of the pen tip of the active pen 100 on the touch screen based on the first sensing signals. Furthermore, the multiple third pins 301 can receive second sensing signals generated by the connected electrodes 400, thereby identifying the rotation state of the active pen 100 based on the second sensing signals, thus enabling interaction between the electronic device and the active pen 100. Since the rotation state identification of the active pen 100 is achieved through the second sensing signals generated based on the second coding signal, no additional gyroscope is required within the active pen 100 while still achieving rotation detection, resulting in a lower cost for the active pen 100.

[0058] Figure 8 This is a schematic diagram of another touch chip provided in the embodiments of this application. The touch chip 300 also includes a detection unit 303. Optionally, the detection unit 303 can be a microcontroller unit (MCU) in the touch chip 300.

[0059] In the case where each detection sub-electrode 1031 of the active pen 100 simultaneously outputs a second coding signal of different frequencies, the third pin 301 of the touch chip 300 can receive multiple second sensing signals of different frequencies generated by the connected electrode 400. The sensing signals of different frequencies are generated based on the second coding signals of different frequencies.

[0060] Specifically, multiple detection sub-electrodes 1031 simultaneously output second coding signals of different frequencies. These signals simultaneously act on the mutual capacitance between the detection sub-electrodes 1031 and the electrodes 400 on the touch screen, causing the electrodes 400 on the touch screen to generate multiple second sensing signals of different frequencies. The detection unit 303 can identify the rotation state of the active pen 100 based on these multiple second sensing signals of different frequencies.

[0061] Optionally, for cases where at least two detection sub-electrodes 1031 of the active pen 100 simultaneously output second coding signals of different frequencies, multiple demodulation units can be set between the detection unit 303 and the signal processing unit 302 connected to each third pin 301. Different demodulation units can be used to demodulate second sensing signals of different frequencies, thereby enabling the rotation state of the active pen 100 to be identified based on multiple second sensing signals of different frequencies. The multiple demodulation units can be multiple digital demodulators set between the detection unit 303 and the signal processing unit 302 connected to each third pin 301. In other implementations, the multiple demodulation units can also be analog demodulators set in the signal processing unit 302. The number of demodulation units can be set according to the number of second coding signal frequencies, and the specific form of the demodulation units can be set as needed.

[0062] In the case where each detection sub-electrode 1031 outputs a second coding signal of the same frequency in sequence according to the detection timing, the third pin 301 of the touch chip 300 can receive the second sensing signal of the same frequency generated by the connected electrode 400 in sequence.

[0063] Specifically, multiple detection sub-electrodes 1031 output second coding signals of the same frequency in a time-division manner. These multiple second coding signals of the same frequency sequentially act on the mutual capacitance between the detection sub-electrodes 1031 and the electrodes 400 on the touch screen, causing the electrodes 400 on the touch screen to generate multiple second sensing signals of the same frequency in sequence. The detection unit 303 can identify the rotation state of the active pen 100 based on the second sensing signals and the detection timing.

[0064] Optionally, for the case where the detection sub-electrode 1031 outputs the second coding signal of the same frequency in sequence according to the detection timing, only one demodulation unit needs to be set between the detection unit 303 and the signal processing unit 302 connected to each third pin 301. The detection unit 303 can determine the detection sub-electrode 1031 that is currently outputting the second coding signal according to the detection timing, and can correspond the second sensing signal with the detection sub-electrode 1031, thereby realizing the recognition of the rotation state of the active pen 100.

[0065] In this embodiment, the touch chip 300 further includes a detection unit 303. The detection unit 303 can identify the rotation state of the active pen 100 based on multiple second sensing signals of different frequencies, or the detection unit 303 can identify the rotation state of the active pen 100 based on the detection timing and the second sensing signals, thereby realizing the detection of the rotation state of the active pen 100. Since the touch chip 300 is provided with a detection unit 303, the task of detecting the rotation state of the active pen 100 based on the second sensing signals can be implemented through the detection unit 303. Compared with not providing a detection unit 303, the computational load of the processor in the electronic device can be reduced, the performance of the electronic device can be improved, and the detection efficiency can be improved by using a separate detection unit 303 without waiting for the processor of the electronic device to complete other tasks.

[0066] The following explains the specific detection process for the rotation state of the active pen 100: In one possible implementation, the detection unit 303 can determine the projection coordinates of the detection sub-electrode 1031 corresponding to the second sensing signal on the touch screen based on the second sensing signal, and determine the rotation state of the active pen 100 based on the change of the projection coordinates.

[0067] Similar to the contact position between the detection pen tip electrode 102 and the touch screen, since the second sensing signal is generated based on the second coding signal acting on the mutual capacitance, the touch screen can determine the corresponding detection sub-electrode 1031 and its position based on the second sensing signal. It should be understood that since the detection sub-electrode 1031 is not in contact with the touch screen, the determined position is the projection coordinate of the detection sub-electrode 1031. When the active pen 100 rotates, the position of the detection sub-electrode 1031 changes, and the projection coordinates determined by the detection unit 303 change with the position of the detection sub-electrode 1031. The detection unit 303 can determine the rotation state of the active pen 100 based on the trajectory of the change of the projection coordinates corresponding to the detection sub-electrode 1031. Specifically, when multiple detection sub-electrodes 1031 simultaneously output second coding signals of different frequencies, the detection unit 303 can determine the correspondence between the second sensing signal and the detection sub-electrode 1031 based on the frequency of the second sensing signal. Thus, the movement trajectory of the corresponding detection sub-electrode 1031 can be determined based on the change of the second sensing signal. When multiple detection sub-electrodes 1031 output second coding signals of the same frequency in a time-division manner, the detection unit 303 can determine the detection sub-electrode 1031 currently outputting the second coding signal based on the detection timing. This allows the determination of the correspondence between the second sensing signal and the detection sub-electrode 1031 to determine the movement trajectory of the corresponding detection sub-electrode 1031 based on the change of the second sensing signal.

[0068] In other detection methods, the detection unit 303 can also determine the distance between the detection sub-electrode 1031 and the touch screen based on the change in the intensity of the second sensing signal. It should be understood that when the active pen 100 rotates, the distance between the detection sub-electrode 1031 and the touch screen will also change. The signal intensity of the second sensing signal generated based on the second coding signal output by each detection sub-electrode 1031 changes. The change in the distance between the detection sub-electrode 1031 and the touch screen can be determined based on the change in the signal intensity of the second sensing signal, so as to determine the rotation state of the active pen 100.

[0069] In this embodiment, the detection unit 303 can determine the projection coordinates of the detection sub-electrode 1031 on the touch screen based on the second sensing signal, and determine the rotation state of the active pen 100 based on the change of the projection coordinates. Thus, the rotation state of the active pen 100 can be determined based on the second sensing signal. The movement trajectory of the projection coordinates will not be affected by external factors such as the movement of the active pen 100 body or the posture of the active pen 100 body, so that the detected rotation state of the active pen 100 is highly accurate.

[0070] In one possible implementation, the detection unit 303 can identify the tilt angle of the active pen 100 based on the second sensing signal.

[0071] In addition to determining the rotation state of the active pen 100 based on the second sensing signal, the tilt angle of the active pen 100 can also be determined based on the second sensing signal. This tilt angle is the angle between the axis of the active pen 100 and the normal to the touch screen. Specifically, when the tilt angle of the active pen 100 is different, the distance between the same detection sub-electrode 1031 and the touch screen is different, that is, the distance between the same detection sub-electrode 1031 and the electrode 400 on the touch screen is different. The higher the tilt angle of the active pen 100, the smaller the distance between the detection sub-electrode 1031 and the touch screen, the larger the mutual capacitance between the detection sub-electrode 1031 and the electrode 400 on the touch screen, and the stronger the second sensing signal. Therefore, the distance between the detection sub-electrode 1031 and the touch screen can be determined based on the strength of the second sensing signal corresponding to the same detection sub-electrode 1031, and thus the tilt angle of the active pen 100 can be determined based on the distance between the detection sub-electrode 1031 and the touch screen.

[0072] Optionally, in the case where multiple detection sub-electrodes 1031 simultaneously output second coding signals of different frequencies, the detection unit 303 can determine the intensity of each second sensing signal based on the second sensing signals corresponding to multiple different frequencies, thereby determining the distance between each detection sub-electrode 1031 and the touch screen based on the intensity of each second sensing signal, so as to determine the tilt angle of the active pen 100.

[0073] Optionally, for cases where multiple detection sub-electrodes 1031 sequentially output second coding signals of the same frequency according to the detection timing sequence, the detection unit 303 can determine the correspondence between the detection sub-unit and the second sensing signal according to the detection timing sequence, that is, the currently generated second sensing signal and the detection sub-unit that currently outputs the second coding signal, so as to determine the corresponding detection sub-unit and the touch screen according to the intensity of the second sensing signal, and thus determine the tilt angle of the active pen 100.

[0074] In this embodiment, the detection unit 303 can identify the tilt angle of the active pen 100 based on the second sensing signal. The detection sub-electrode 1031 can be reused to detect the tilt angle of the active pen 100. Since the active pen 100 itself is reused for rotation angle detection and tilt detection, there is no need to set up an additional tilt detection sensor, which can reduce the cost of the active pen 100.

[0075] In one possible implementation, the third pin 301 can output a matching signal to the connected electrode 400, causing the active pen 100 to output a first coding signal through the pen tip electrode 102 and a second coding signal through the detection electrode 103 according to the touch protocol indicated by the matching signal.

[0076] The matching signal can indicate the touch protocol, which can instruct the active pen chip to use a coding method. For example, the touch protocol can instruct the active pen chip 200 to simultaneously output second coding signals of different frequencies to at least two detection sub-electrodes 1031, or instruct the active pen chip 200 to sequentially output second coding signals of the same frequency to at least two detection sub-electrodes 1031 according to the detection timing sequence, etc. The touch protocol can also instruct the signal amplitude, signal frequency, signal waveform, etc. of the coding signal output by the active pen chip 200.

[0077] After the third pin 301 of the touch chip 300 outputs a matching signal to the connected electrode 400, the active pen 100 can receive the matching signal through the pen tip electrode 102. After receiving the matching signal, the pen tip electrode 102 sends the matching signal to the active pen chip 200 of the active pen 100. After receiving the matching signal, the active pen chip 200 outputs a first coding signal to the pen tip electrode 102 through the first pin 201 and a second coding signal to the connected detection sub-electrode 1031 through the second pin 202, according to the touch protocol indicated by the matching signal.

[0078] In this embodiment, the third pin 301 of the touch chip 300 can output a matching signal to the connected electrode 400, so that the active pen 100 outputs a first coding signal through the pen tip electrode 102 and a second coding signal through the detection electrode 103 according to the touch protocol indicated by the matching signal. Thus, the active pen 100 and the touch screen can be matched with the touch protocol through the matching signal, so as to control the coding method of the active pen 100 through the matching signal. In this way, the pen tip click position and the rotation state of the active pen 100 can be detected by the detection method agreed in the touch protocol, so as to realize the interaction between the active pen 100 and the active pen 100.

[0079] This application also provides an active pen 100, including: a pen shell 101, a pen tip electrode 102, a detection electrode 103, and an active pen chip 200 from any of the foregoing embodiments.

[0080] like Figures 1 to 4As shown, the pen tip electrode 102 is partially located outside the pen housing 101 and partially located inside the pen housing 101. The detection electrode 103 is disposed inside the pen housing 101. The detection electrode 103 includes at least two detection sub-electrodes 1031. The at least two detection sub-electrodes 1031 are arranged around the pen tip electrode 102. The at least two detection sub-electrodes 1031 are insulated from each other, and the detection sub-electrodes 1031 are insulated from the pen tip electrode 102.

[0081] The pen tip electrode 102 can contact the touch screen of the electronic device, and after contacting the touch screen, it transmits the first coding signal output by the active pen chip 200, so that the touch screen determines the contact position between the pen tip electrode 102 and the touch screen according to the first coding signal. The detection sub-electrode 1031 can transmit the second coding signal output by the active pen chip 200, so that the touch screen identifies the rotation state of the active pen 100 according to the second coding signals output by at least two detection sub-electrodes 1031, wherein the rotation state includes at least one of rotation angle and rotation direction.

[0082] Optionally, in order to balance the detection accuracy of the rotation state and the frequency of the signal, the detection electrode 103 may include two or three detection sub-electrodes 1031.

[0083] In this embodiment, the active pen is the active pen 100 in any of the preceding embodiments, the pen shell is the pen shell 101 in any of the preceding embodiments, the pen tip electrode is the pen tip electrode 102 in any of the preceding embodiments, the detection electrode is the detection electrode 103 in any of the preceding embodiments, and the active pen chip is the active pen chip 200 in any of the preceding embodiments. For specific structure and interaction, please refer to the description in any of the preceding embodiments.

[0084] This application also provides a touch screen, including multiple electrodes and a touch chip as described in any of the foregoing embodiments. The touch chip is electrically connected to the multiple electrodes via multiple third pins.

[0085] In this embodiment, the touch screen can be the touch screen in any of the foregoing embodiments, the electrodes can be electrodes 400 distributed on the touch screen in any of the foregoing embodiments, the touch chip can be the touch chip 300 in any of the foregoing embodiments, and the interaction between the electrodes 400 and the touch chip 300 and the active pen 100, as well as the specific structure, can be referred to the description in any of the foregoing embodiments.

[0086] This application also provides an electronic device, including the touch chip 300 in any of the foregoing embodiments or the touch screen in any of the foregoing embodiments.

[0087] In this application embodiment, the touch screen can be the touch screen in any of the foregoing embodiments, the touch chip can be the touch chip 300 in any of the foregoing embodiments, and the interaction between the touch chip 300 and the touch screen and the active pen 100, as well as the specific structure, can be referred to the description in any of the foregoing embodiments.

[0088] It should be understood that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for the method embodiments, since they are basically similar to the methods described in the apparatus and system embodiments, the description is relatively simple, and relevant parts can be referred to the descriptions of other embodiments.

[0089] It should be understood that the foregoing describes specific embodiments of this specification. Other embodiments are within the scope of the claims. In some cases, the actions or steps recited in the claims may be performed in a different order than that shown in the embodiments and may still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require the specific or sequential order shown to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0090] It should be understood that the use of a singular form to describe an element or to show only one element in the accompanying drawings does not imply that the number of such element is limited to one. Furthermore, modules or elements described or shown as separate herein may be combined into a single module or element, and modules or elements described or shown as single herein may be broken down into multiple modules or elements.

[0091] It should also be understood that the terminology and expressions used herein are for descriptive purposes only, and one or more embodiments described herein should not be limited to these terms and expressions. The use of these terms and expressions does not exclude any illustrative and descriptive equivalent features (or parts thereof), and it should be recognized that various modifications that may exist should also be included within the scope of the claims. Other modifications, variations, and substitutions may also exist. Accordingly, the claims should be considered to cover all such equivalents.

Claims

1. An active pen chip, applied to an active pen, the active pen comprising a pen housing, a pen tip electrode, and a detection electrode, wherein the pen tip electrode is partially located outside and partially located inside the pen housing, the detection electrode is disposed inside the pen housing, the detection electrode comprising at least two detection sub-electrodes, the at least two detection sub-electrodes being disposed around the pen tip electrode, the at least two detection sub-electrodes being insulated from each other, and the detection sub-electrodes being insulated from the pen tip electrode, characterized in that, The active pen chip includes: a first pin and at least two second pins; The first pin is electrically connected to the pen tip electrode, and the at least two second pins are electrically connected to the at least two detection sub-electrodes, with different second pins being electrically connected to different detection electrodes; The first pin is used to output a first coding signal to the pen tip electrode after the pen tip electrode contacts the touch screen, so that the touch screen determines the contact position between the pen tip electrode and the touch screen according to the first coding signal. The second pin is used to output a second coding signal to the connected detection sub-electrode, so that the touch screen can identify the rotation state of the active pen according to the second coding signal output by the at least two detection sub-electrodes, wherein the rotation state includes at least one of rotation angle and rotation direction.

2. The active pen chip according to claim 1, characterized in that, Each of the second pins simultaneously outputs a second coding signal of a different frequency to the connected detection sub-electrode, so that each of the detection sub-electrodes simultaneously outputs a second coding signal of a different frequency.

3. The active pen chip according to claim 1, characterized in that, Each of the second pins outputs the second coding signal of the same frequency to the connected detection sub-electrode in sequence according to the detection timing, and only one of the second pins outputs the second coding signal at any given time, so that each of the detection sub-electrodes outputs the second coding signal of the same frequency in sequence according to the detection timing.

4. The active pen chip according to claim 1, characterized in that, The first pin is used to receive a matching signal transmitted by the pen tip electrode and sent by the touch screen, and to output the first coding signal to the pen tip electrode according to the touch protocol indicated by the matching signal. The second pin is used to output the second coding signal to the connected detection sub-electrode according to the touch protocol indicated by the matching signal.

5. A touch chip, used in a touch screen, characterized in that, The touch chip includes: multiple third pins; The plurality of third pins are electrically connected to the plurality of electrodes on the touch screen; The third pin is used to receive a first sensing signal generated by the connected electrode. The first sensing signal is generated based on a first coding signal acting on the mutual capacitance between the electrode and the pen tip electrode of the active pen. The first coding signal is output by the pen tip electrode. The third pin is also used to receive a second sensing signal generated by the connected electrode. The second sensing signal is generated based on a second coding signal acting on the mutual capacitance between the electrode and the detection sub-electrode of the active pen. The second coding signal is output by the detection sub-electrode. The first sensing signal is used to determine the contact position between the pen tip electrode and the touch screen. The second sensing signal is used to identify the rotation state of the active pen, wherein the rotation state includes at least one of rotation angle and rotation direction. The active pen includes the pen tip electrode, a pen housing, and a detection electrode. The pen tip electrode is partially located outside and partially located inside the pen housing. The detection electrode is disposed inside the pen housing and includes at least two detection sub-electrodes. The at least two detection sub-electrodes are arranged around the pen tip electrode, and the at least two detection sub-electrodes are insulated from each other and from the pen tip electrode.

6. The touch chip according to claim 5, characterized in that, The touch chip also includes: a detection unit; The third pin is used to receive multiple second sensing signals of different frequencies generated by the connected electrode. The sensing signals of different frequencies are generated based on the second coding signals of different frequencies, and each detection sub-electrode simultaneously outputs the second coding signals of different frequencies. The detection unit is used to identify the rotation state of the active pen based on multiple second sensing signals of different frequencies. or, The third pin is used to receive multiple second sensing signals of the same frequency generated by the connected electrode. The sensing signals of the same frequency are generated based on the second coding signal of the same frequency. Each of the detection sub-electrodes outputs the second coding signal of the same frequency in sequence according to the detection timing. The detection unit is used to identify the rotation state of the active pen based on the detection timing and the second sensing signal.

7. The touch chip according to claim 6, characterized in that, The detection unit is configured to determine the projection coordinates of the detection sub-electrode corresponding to the second sensing signal on the touch screen based on the second sensing signal, and to determine the rotation state of the active pen based on the change of the projection coordinates.

8. The touch chip according to claim 6, characterized in that, The detection unit is used to identify the tilt angle of the active pen based on the second sensing signal.

9. The touch chip according to claim 5, characterized in that, The third pin is used to output a matching signal to the connected electrode, so that the active pen outputs the first coding signal through the pen tip electrode and the second coding signal through the detection electrode according to the touch protocol indicated by the matching signal.

10. An active pen, characterized in that, include: Pen casing, pen tip electrode, detection electrode, and active pen chip as described in any one of claims 1-4; The pen tip electrode is partially located outside the pen casing and partially located inside the pen casing. The detection electrode is disposed inside the pen casing. The detection electrode includes at least two detection sub-electrodes. The at least two detection sub-electrodes are arranged around the pen tip electrode. The at least two detection sub-electrodes are insulated from each other and from the pen tip electrode. The pen tip electrode is configured to contact the touch screen of the electronic device, and after contacting the touch screen, it transmits the first coding signal output by the active pen chip, so that the touch screen determines the contact position between the pen tip electrode and the touch screen according to the first coding signal. The detection sub-electrode is used to transmit the second coding signal output by the active pen chip, so that the touch screen can identify the rotation state of the active pen according to the second coding signal output by the at least two detection sub-electrodes, wherein the rotation state includes at least one of rotation angle and rotation direction.

11. The active pen according to claim 10, characterized in that, The detection electrode includes two or three detection sub-electrodes.

12. A touch screen, characterized in that, include: Multiple electrodes and a touch chip as described in any one of claims 5-9; The touch chip is electrically connected to the plurality of electrodes via a plurality of third pins.

13. An electronic device, characterized in that, include: The touch chip as described in any one of claims 5-9, or the touch screen as described in claim 12.

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